to build on students' knowledge of triangle and develop students' reasoning with properties of different classes of triangles to develop students' language related to different ... other mathematical ...

Interior angles in a triangle sum to a half turn (180˚). Quadrilaterals close quadrilateralA polygon with four straight sides. have four sides and four angles. Interior angles in a quadrilateral ...

Solving 'geometric' problems - Edexcel Geometric problems can involve finding the perimeter and area of shapes like triangles and quadrilaterals ... Algebra problems can relate to any area ...